After reading Xeal's post about his ban list, it got me thinking about mine which I've only used about once or twice in the last 2 years but is relatively long due to my hateful ways back when I was new to Byond.

CrossOfDDX reason=pager+ban
Dusangi15 reason=pager+ban
Pastrami reason=pager+ban
Xooxer reason=pager+ban
Liushinkyu reason=pager+ban
Blueshift59 reason=pager+ban
Choque reason=pager+ban
Algorion reason=pager+ban
Superdude2489 reason=pager+ban
GameGuy reason=pager+ban
Nabesys reason=pager+ban
Cadohacan reason=pager+ban
SsJ4Leon reason=pager+ban
Darkel_Aloriath reason=pager+ban
Ashcool reason=pager+ban
He-Man reason=pager+ban
WarStrife reason=pager+ban
Azu reason=pager+ban
ZechsMerquise reason=pager+ban
Punksayin reason=pager+ban
Dark-Vegita reason=pager+ban
KILLJOY2001 reason=pager+ban
Zell213 reason=pager+ban
Mysticgohanssj3 reason=pager+ban
Light_Samurai reason=pager+ban
Darklightning reason=pager+ban
Vadric reason=pager+ban
Ssj5goken reason=pager+ban&address=24.92.43.71
Sariat reason=pager+ban
UberJizzle reason=pager+ban
Golden_mog reason=pager+ban
Blazer reason=pager+ban
ShadowSaiyan reason=pager+ban
WingZero666 reason=pager+ban
HaLLuZiNaTiOnZ reason=pager+ban
Myssssst reason=pager+ban
Rinaldo reason=pager+ban
Masteryuri reason=pager+ban
Vessol reason=pager+ban
GokuAnime reason=pager+ban
TsengTrueGuerilla reason=pager+ban
SupremeSaiya-jin reason=pager+ban
Sprinkster reason=pager+ban
SuperHimura reason=pager+ban
Cotin reason=pager+ban
KrosTrikare reason=pager+ban

The vast majority of my bans I have forgotten why I did them but I'll assume I did them for at least a semi-good reason and keep them. The only one I can remember for sure is Ashcool. I was playing some snowboard/snowfight game back in early 2002 and he was spam-hitting me constantly. It pissed me off so I decided that I'd pager ban him in case he ever tried to join a game that I was hosting at a later date. Basically, it was the only vague way I had at getting back at him besides doing back what he did to me, which if I remember right I probably did before he logged off...so ya, there's my banned list.